1 files changed, 129 insertions, 0 deletions
diff --git a/arch/i386/kernel/isr.s b/arch/i386/kernel/isr.s
new file mode 100644
index 0000000..55db35e
--- /dev/null
+++ b/arch/i386/kernel/isr.s
@@ -0,0 +1,129 @@
+.section .text
+
+.macro isr_err_stub num
+.global isr_stub_\num
+.type isr_stub_\num, @function
+isr_stub_\num:
+        cli
+        pushl $\num
+        jmp isr_frame_asm
+.endm
+.macro isr_no_err_stub num
+.global isr_stub_\num
+.type isr_stub_\num, @function
+isr_stub_\num:
+        cli
+        pushl $0
+        pushl $\num
+        jmp isr_frame_asm
+.endm
+
+.macro irq_stub num
+.global irq_stub_\num
+.type irq_stub_\num, @function
+irq_stub_\num:
+        cli
+        pushl $0
+        pushl $\num+32
+        jmp isr_frame_asm
+.endm
+
+.global syscall_stub
+syscall_stub:
+        cli
+        pushl $0
+        pushl $0x80
+        jmp isr_frame_asm
+
+isr_frame_asm:
+        pushl %eax
+        pushl %ebx
+        pushl %ecx
+        pushl %edx
+        pushl %esi
+        pushl %edi
+
+        movl %cr0, %eax
+        pushl %eax
+        movl %cr2, %eax
+        pushl %eax
+        movl %cr3, %eax
+        pushl %eax
+        movl %cr4, %eax
+        pushl %eax
+
+        pushl %esp
+        call set_kernel_esp
+        addl $4, %esp
+
+        cld
+        call interrupt_handler
+
+        popl %eax
+        movl %eax, %cr4
+        popl %eax
+        movl %eax, %cr3
+        popl %eax
+        movl %eax, %cr2
+        popl %eax
+        movl %eax, %cr0
+
+        popl %edi
+        popl %esi
+        popl %edx
+        popl %ecx
+        popl %ebx
+        popl %eax
+        addl $8, %esp
+
+        iret
+
+isr_no_err_stub 0
+isr_no_err_stub 1
+isr_no_err_stub 2
+isr_no_err_stub 3
+isr_no_err_stub 4
+isr_no_err_stub 5
+isr_no_err_stub 6
+isr_no_err_stub 7
+isr_err_stub    8
+isr_no_err_stub 9
+isr_err_stub    10
+isr_err_stub    11
+isr_err_stub    12
+isr_err_stub    13
+isr_err_stub    14
+isr_no_err_stub 15
+isr_no_err_stub 16
+isr_err_stub    17
+isr_no_err_stub 18
+isr_no_err_stub 19
+isr_no_err_stub 20
+isr_err_stub    21
+isr_no_err_stub 22
+isr_no_err_stub 23
+isr_no_err_stub 24
+isr_no_err_stub 25
+isr_no_err_stub 26
+isr_no_err_stub 27
+isr_no_err_stub 28
+isr_err_stub    29
+isr_err_stub    30
+isr_no_err_stub 31
+
+irq_stub 0
+irq_stub 1
+irq_stub 2
+irq_stub 3
+irq_stub 4
+irq_stub 5
+irq_stub 6
+irq_stub 7
+irq_stub 8
+irq_stub 9
+irq_stub 10
+irq_stub 11
+irq_stub 12
+irq_stub 13
+irq_stub 14
+irq_stub 15